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Full Discussion: Moving line up if line starts with + sign.
Top Forums Shell Programming and Scripting Moving line up if line starts with + sign. Post 302804587 by hanson44 on Wednesday 8th of May 2013 11:59:33 PM
Old 05-09-2013
Code:
awk 'NR>1 && !/^\+/{print RS}1 END{print RS}' ORS= file1

Should be (using gawk anyway, did not test with other awk versions):
Code:
awk 'NR>1 && !/^\+/{print RS}{print} END{print RS}' ORS= file1

Code:
$ cat test.sh
echo input file:
cat file1
echo
echo original approach did not work:
awk '!/^\+/{ORS=FS}/^\+/{ORS=RS}1' file1
echo
echo
echo scrutinizer approach throws a syntax error:
awk 'NR>1 && !/^\+/{print RS}1 END{print RS}' ORS= file1
echo
echo scrutinizer approach modified a little works:
awk 'NR>1 && !/^\+/{print RS}{print} END{print RS}' ORS= file1
echo
echo yoda suggested change did not help:
awk '!/^\+/{ORS=""}/^\+/{ORS=RS}1' file1

Code:
$ ./test.sh
input file:
Line 1
+ Line 2
Line 3
+ Line 4
+ Line 5
Line 6
+ Line 7
+ Line 8
+ Line 9
Line 10
Line 11

original approach did not work:
Line 1 + Line 2
Line 3 + Line 4
+ Line 5
Line 6 + Line 7
+ Line 8
+ Line 9
Line 10 Line 11

scrutinizer approach throws a syntax error:
awk: cmd. line:1: NR>1 && !/^\+/{print RS}1 END{print RS}
awk: cmd. line:1:                           ^ syntax error

scrutinizer approach modified a little works:
Line 1+ Line 2
Line 3+ Line 4+ Line 5
Line 6+ Line 7+ Line 8+ Line 9
Line 10
Line 11

yoda suggested change did not help:
Line 1+ Line 2
Line 3+ Line 4
+ Line 5
Line 6+ Line 7
+ Line 8
+ Line 9
Line 10Line 11

This User Gave Thanks to hanson44 For This Post:
Scrutinizer
 

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LEARN ABOUT DEBIAN

geometry::primitive::line

Geometry::Primitive::Line(3pm)				User Contributed Perl Documentation			    Geometry::Primitive::Line(3pm)

NAME

       Geometry::Primitive::Line - A Line

DESCRIPTION

       Geometry::Primitive::Line represents a straight curve defined by two points.

SYNOPSIS

	 use Geometry::Primitive::Line;

	 my $line = Geometry::Primitive::Line->new();
	 $line->start($point1);
	 $line->end($point2);

ATTRIBUTES

   end
       Set/Get the end point of the line.

   start
       Set/Get the start point of the line.

METHODS

   new
       Creates a new Geometry::Primitive::Line

   contains_point
       Returns true if the supplied point is 'on' the line.  Accepts either a point object or an x y pair.

   grow
       Does nothing, as I'm not sure how.  Patches or hints welcome.

   is_parallel ($other_line)
       Returns true if the supplied line is parallel to this one.

   is_perpendicular ($other_line)
       Returns true if the supplied line is perpendicular to this one.

   length
       Get the length of the line.

   point_end
       Get the end point.  Provided for Shape role.

   point_start
       Get the start point.  Provided for Shape role.

   scale
       Does nothing at the moment.

   slope
       Get the slope of the line.

   to_string
       Guess!

   y_intercept
       Returns the Y intercept of this line.

AUTHOR

       Cory Watson <gphat@cpan.org>

COPYRIGHT &; LICENSE
       You can redistribute and/or modify this code under the same terms as Perl itself.

perl v5.10.1							    2010-01-10					    Geometry::Primitive::Line(3pm)
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